This low, air resistance creates drag, so the station is constantly slowing down and losing altitude at the rate of about two miles of altitude every month.
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Since He is much less dense that air (He has only 14% of the density of air) the drag and flutter of the platters in the drives is reduced.
There are so few air particles to create drag that a slow rotation can quickly accelerate into an uncontrollable spin.
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Frictional drag means the air closest to the surface of the fuselage moves more slowly than the rest.
By changing the angle of its wings and its body, the moth was able to create a delicate balance between the thrust pushing it forwards, the drag - or air resistance - pushing against it, and the lift keeping it in the air.
The engine constantly throttles up and down, not only to counter the drag on the satellite from residual air molecules in near space but also to smooth the flight of the vehicle to minimise the noise in the gravity measurements.
Residual air molecules more than 200km above the planet will generate drag on the probe and pull it down faster and faster - although it could be some weeks yet before there is an impact.
It was pushed to this height recently to take it clear of residual air molecules at the top of the atmosphere that tend to drag it downwards over time.
Yet because AIR lets SlideRocket tap into the storage of a PC, it has a drag-and-drop file system similar to Windows Office.
"Rather than air being sucked into the radiators, the air is going straight over to the exhaust -- this benefits in terms of lower drag, " explains Scarborough.
Music is loaded via drag-and-drop, Disc2Phone PC software, or using an "over-the-air" provider of choice.
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Since the drag on a human body is approximately seven hundred and eighty times as great in water as in air, swimmers wearing the suits were able to post faster times.
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